Sorted TODOs.

DG_Approximation.py

@@ -20,12 +20,24 @@ TODO: Discuss descriptions (matrices, cfl number, right-hand side,
     limiting slope, basis, wavelet, etc.)
 TODO: Discuss referencing info on SSPRK3
 
+TODO: Discuss adjusting Box to different interval -> Done (do)
+TODO: Discuss adjusting FourPeakWave to different interval -> Done (do)
+TODO: Discuss adjusting Heaviside to different interval -> Done (do)
+TODO: Discuss whether x0 for DiscontinuousConstant is useful -> Done (is,
+    otherwise it is equal to one-sided Heaviside)
+TODO: Discuss why the discontinuity position is only used for one-sided
+    Heaviside -> Done (add for all functions)
+
 Urgent:
-TODO: Change Heaviside random to uniform(-100, 100)
+TODO: Introduce 'training_data_mode' to allow forbidden mesh size during
+    training -> Done
+TODO: Change Heaviside random to uniform(-100, 100) -> Done
 TODO: Adjust Heaviside to have non-symmetric values (left- and right_value)
-TODO: Give option to set discontinuity to cell boundary
-TODO: Fix typo in LinearAbsolute
+    -> Done
+TODO: Give option to set discontinuity to cell boundary -> Done
+TODO: Fix typo in LinearAbsolute -> Done
 TODO: Introduce middle_factor for two-sided Heaviside
+TODO: Adjust polynomial degree for ANN Data Generator
 TODO: Rename 'adjustment' to 'shift'
 TODO: Induce shift in IC class
 TODO: Move plot_approximation_results() into plotting script
@@ -38,6 +50,10 @@ TODO: Unify use of 'mesh' and 'grid' in naming
 TODO: Check sign change in stiffness matrix to accommodate negative wave speed
 TODO: Check whether 'projection' is always a ndarray
 TODO: Force input_size for each ANN model to be stencil length
+TODO: Unify print commands (f vs no f)
+TODO: Add method and error info to Mesh
+TODO: Add use of discontinuity position to all ICs
+TODO: Adjust definitions of each IC to be dependant on domain
 
 Critical, but not urgent:
 TODO: Introduce env files for each SM rule